Moreover, prior to the adoption of the 2010 WHO guidelines [12] which recommended that ART should be given to all patients regardless of CD4 cell count starting as soon as possible after TB treatment is tolerated and not later than within 8 weeks [13], all non-Stage 4 TB patients needed a CD4 count measurement to assess their eligibility to ART as per 2006 guidelines [13]. The gene discussed is CD4; the disease is tuberculosis.